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ASN Wikibase Occurrence # 155563
Last updated: 14 October 2021
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Type:Silhouette image of generic A333 model; specific model in this crash may look slightly different
Airbus A330-343X
Owner/operator:Singapore Airlines
Registration: 9V-STO
MSN: 1132
Fatalities:Fatalities: 0 / Occupants: 117
Other fatalities:0
Aircraft damage: Minor
Location:Bangkok-Suvarnabhumi International Airport (BKK/VTBS) -   Thailand
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Singapore-Changi International Airport (SIN/WSSS)
Destination airport:Dhaka-Shahjalal International Airport (DAC/VGHS)
Investigating agency: AAIB Singapore
An Airbus A330-343X passenger plane, operated by Singapore Airlines made an emergency landing following indications of smoke in the rear cargo hold.
Flight SQ446 was en route between Singapore and Dhaka at FL380 when over southern Myanmar there were indications of smoke from the aircraft's rear cargo hold. Extinguishing agents were discharged in the cargo hold and the crew diverted to Bangkok-Suvarnabhumi International Airport (BKK), Thailand. Descent was initiated at 19:26 and the airplane landed uneventfully on runway 19R at 19:53, Bangkok time.
Passengers and crew disembarked safely from the aircraft using stairs and emergency services tended to the rear cargo hold were smoke was seen billowing from the hold. Cargo was extensively damaged.

An investigation showed that the area of fire origin was most likely in cargo container 42L, although it is not possible to pinpoint the exact location, given the extent of the fire damage of the contents of the container.
While the presence of ethanol, an ignitable liquid which could have fueled the fire, was found by the investigators, the heat source that was needed to ignite the ethanol could not be determined.

The fire was initially controlled but rekindled after the aft cargo door was opened after landing. The rekindling of the fire was triggered by the fresh supply of air despite the spraying, from time to time, of carbon dioxide into the aft cargo compartment by the ARFS.


Accident investigation:
Investigating agency: AAIB Singapore
Status: Investigation completed
Download report: Final report


Photo of 9V-STO courtesy

Adelaide - International (YPAD / ADL)
31 December 2012; (c) Andrei Bezmylov

Revision history:

24-Apr-2013 09:57 gerard57 Added
24-Apr-2013 17:23 harro Updated [Aircraft type, Location, Departure airport, Destination airport, Narrative]
24-Apr-2013 17:34 harro Updated [Time, Source, Narrative]
23-Apr-2014 17:35 harro Updated [Source]
15-Jul-2015 19:56 harro Updated [Source, Damage, Narrative]

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